Unit 5 Section A (3a-3d)课件2026-2027学年人教版英语九年级上册

课型：听说课 课时：3a-3d Unit 5 Power of Ideas Section A What changes can inventions bring to our lives? Learning Objectives In this lesson you will: extract key information (inventor, time, impact) from a conversation about the radio. 2. discuss how an invention changes the world and express their own opinions. 3. create a mind map about another important invention and describe it to a partner. Let’s watch and think. When was the ______________ invented? It was invented in 1964. Let’s ask and answer! high-speed train Who invented the bulb? It was invented by Edison. Let’s ask and answer! car Karl Benz in 1885 calculator in 1971 What is it? Who and when was it invented … telephone in 1876 TV in 1927 Pre-listening Look at this old machine. Do you know what it was used for? It was invented to receive radio messages from far away. 1895年，意大利无线电工程师、企业家伽利尔摩·马可尼（ Guglielmo Marconi ），在意大利的博洛尼亚（ Bologna ）成功地把无线电信号发送到了1.5英里外的地方，他成为了世界上第一台实用的无线电报系统的发明者，并于1909年获得诺贝尔物理学奖（ In recognition of his contributions to the development of wireless telegraphy ），被称作“无线电之父”。 Pre-listening 3a Listen to the conversation. Pay attention to how the key information is stressed. Then role-play the conversation. He thinks radio is the most useful invention. Let’s listen and answer. 1. What invention are Fu Xing and Peter talking about? ____________________________________________________ 2. Where is Guglielmo Marconi from? ____________________________________________________ 3. When was the first radio message sent across the Atlantic Ocean? ____________________________________________________ They are talking about the radio. He is from Italy. In 1901. Read again and complete the chart. 3b Guglielmo Marconi. He developed the idea in the 1890s, and the first radio message was sent across the Atlantic Ocean in 1901. It made information spread much faster. the radio It helped the development of other important inventions like the television. The radio made it much easier for people to enjoy music from artists around the world. Post-listening Listen to the conversation. Pay attention to how the key information is stressed. Then role-play the conversation. 朗读提示： 一、名词类（核心事物、专有名词，必须重读） 如：核心词 the radio 每一次出现都重读，这是全文中心话题。 二、数字 / 时间（突出时间节点，重读） 如：1890s 三、形容词、程度副词（体现对比、程度，重读） 如：the most useful 四、动词（体现发明作用、动作，被动分词重点重读） 如：invented 五、逻辑 / 强调关键词（突出问答核心、因果） 如：why 3c Choose another invention that you think is the most important and make a mind map about it. Then describe it to a partner. 3d The mobile phone Inventor When What it is used for How it changed the world Martin Cooper in 1973 call people, send messages, take photos, surf the internet, ... made communication easier, made our lives more convenient, ... Choose another invention that you think is the most important and make a mind map about it. Then describe it to a partner. 3d I think the mobile phone is one of the most important inventions. Invented by Martin Cooper in 1973, it has greatly changed our daily lives. It is convenient to carry because it is small and thin. We can not only keep in touch with others anytime and anywhere by making calls and sending messages, but also take photos, surf the internet, study and work easily. It made communication much faster and brought people closer. Undoubtedly, the mobile phone made our lives more convenient and colourful. Many inventions make our life easier, but some also bring troubles. Can you name one invention that has both good and bad influences on humans? The smartphone is such an invention. It was invented to connect people easily. On one hand, we can chat, study and shop online. On the other hand, many students spend too much time on it, and their eyesight and study are badly influenced. Discuss the question and talk. Key word Expressions invent of all time, in seconds, for the first time ① What do you think is the most useful invention of all time? ② Who was the inventor? ③ ... made it much easier for sb. to do sth. Sentences 16 It also had a big effect on music. 它对音乐也产生了很大的影响。 have/has a big effect on … 对……有重大影响 have a good effect on 对…… 有好影响 have a bad effect on 对…… 有坏影响 Weather has an effect on crops. 天气对农作物有影响。 Language Points 17 Exercises Many everyday objects __________ (make) by 3D printers today. The first radio message __________ (send) across the ocean in 1901. The plastic __________ (heat) and then shaped into different forms. The computer file __________ (need) to be checked before printing. Different materials __________ (use) to produce things in this factory. Music from all over the world __________ (play) on the radio every day. The 3D printer __________ (control) by a smartphone app. These new inventions __________ (develop) by young engineers last year. 用所给词的适当形式填空。 are made was sent is heated is needed are used is played is controlled were developed Homework 基础作业 拓展作业 实践作业 完成本课重点单词（如 3D printer, file, plastic, inventor, radio, spread 等）的背诵与默写，并完成被动语态（一般现在时、一般过去时及情态动词被动）的填空练习。 根据听力中关于 3D 打印机的工作原理和阅读中关于收音机的发明历史，用完整英文句子回答相关问题，并选3个主动语态句子改写为被动语态。 选择一项你日常使用的发明或你认为最重要的发明，制作一张英文思维导图，并用英文写一段 60–80 词的介绍，准备向同伴口头描述，其中至少使用 3 个本课所学的被动语态句子。 Lavf57.71.100 Packed by Bilibili XCoder v2.0.2 null 81841.805 null 81841.805 $